[GROOVY-7701] org.codehaus.groovy.runtime.typehandling.GroovyCastException in Groovy ".with { ... }" - Block

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.4.3, 2.4.4, 2.4.5
• Fix Version/s: 4.0.0-alpha-1, 3.0.5, 2.5.13
• Component/s: groovy-jdk
• Environment: all?; Tested with Ubuntu 14.04.3 LTS (64 Bit) | MacOS 10.11 and Groovy 2.4.5, 2.3.4
• Assignee: Eric Milles
• Reporter: Maik Igloffstein
• Created: 03/Dec/15 08:15
• Updated: 16/May/23 13:34
• Resolved: 13/Jun/20 13:34

Description

Problem

subClass.with {
  type = ['String']
}

Should change SubClass.type and not TopClass.type.
The script works fine with type2 instead of type. Is type a reserved word? I can't find any documentation about this.

Unit-Test / Groovy Console-Test

class SubClass{
    List type
}

class TopClass{

    int type = 10

    @Lazy
    List something = {
        List tmp = []
        for(int i = 0; i < 5; i++){
            def subClass = new SubClass()
            subClass.with {
                type = ['String'] // throws org.codehaus.groovy.runtime.typehandling.GroovyCastException
            }
            tmp.add(subClass)
        }
        tmp
    }()
}

def topClass = new TopClass()
println GroovySystem.version
println(topClass.type)
println(topClass.something)
println(topClass.type)

Exception

org.codehaus.groovy.runtime.typehandling.GroovyCastException: Cannot cast object '[String]' with class 'java.util.ArrayList' to class 'int'
	at TopClass$_getSomething_closure1$_closure2.doCall(ConsoleScript3:15)
	at TopClass$_getSomething_closure1.doCall(ConsoleScript3:14)
	at TopClass$_getSomething_closure1.doCall(ConsoleScript3)
	at TopClass.getSomething(ConsoleScript3:11)
	at ConsoleScript3.run(ConsoleScript3:26)

Issue Links

• breaks: GROOVY-9655 Groovy 3.0.5 regression with the "with" keyword
• relates to: GROOVY-11056 modified behavior of variable resolution within Closure